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WARRANTY OBLIGATIONS | 9 Months Ended
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Sep. 30, 2021
Product Warranties Disclosures [Abstract] |
WARRANTY OBLIGATIONS | WARRANTY OBLIGATIONS The Company’s warranty activities were as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2021 |  | 2020 |  | 2021 |  | 2020 |  |
| (In thousands)
Warranty obligations, beginning of period | $ | 59,938 |  |  | $ | 37,907 |  |  | $ | 45,913 |  |  | $ | 37,098 |  |  |
Accruals for warranties issued during period | 4,780 |  |  | 1,939 |  |  | 11,993 |  |  | 4,229 |  |  |
Changes in estimates | 3,593 |  |  | 3,869 |  |  | 15,517 |  |  | 7,294 |  |  |
Settlements | (4,141) |  |  | (3,274) |  |  | (9,828) |  |  | (9,122) |  |  |
Increase due to accretion expense | 1,260 |  |  | 832 |  |  | 3,307 |  |  | 2,410 |  |  |
Other | 2,082 |  |  | 2,506 |  |  | 610 |  |  | 1,870 |  |  |
Warranty obligations, end of period | 67,512 |  |  | 43,779 |  |  | 67,512 |  |  | 43,779 |  |  |
Less: current portion | (16,728) |  |  | (10,760) |  |  | (16,728) |  |  | (10,760) |  |  |
Noncurrent | $ | 50,784 |  |  | $ | 33,019 |  |  | $ | 50,784 |  |  | $ | 33,019 |  |  |
Changes in Estimates In the three months ended September 30, 2021, the Company recorded $3.6 million in warranty expense from change in estimates, of which $2.2 million relates to the increase in replacement costs assumption changes and $1.4 million for continuing analysis of field performance data and diagnostic root-cause failure analysis primarily relating to its prior generation products. In the three months ended September 30, 2020, the Company recorded $3.9 million in warranty expense primarily related to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily relating to its prior generation products. In the nine months ended September 30, 2021, the Company recorded $15.5 million in warranty expense from change in estimates, of which $9.1 million relates to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily relating to its prior generation products, $6.4 million relates to the increase in replacements costs assumption changes. In the nine months ended September 30, 2020, the Company recorded $7.3 million in warranty expense primarily related to continuing analysis of field performance data and diagnostic root-cause failure analysis primarily relating to its prior generation products.

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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